Features: 1) Add filter to exclude products with null stocks and inactive vendors in sitemaps query;

Fixes: None;

Extra: None;

core/sitemaps.py

@@ -16,6 +16,8 @@ class ProductSitemap(Sitemap):
                 is_active=True,
                 brand__is_active=True,
                 category__is_active=True,
+                stocks__isnull=False,
+                stocks__vendor__is_active=True,
             )
             .only("uuid", "name", "modified", "slug")
             .order_by("-modified")